Pagine

What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

Lux's unique philosophy of ''real time proces'' is taken into account in addition to through study of conventional distortion shown by continuous signals. To avoid large capacitor harmful to tonal quality pure DC amplifier circuit is employed.

Perfect Muting Circuit

In the case of a head amp which deals with the lowest level signals, even the slightest thump noises at On/Off switching time cause a serious problem. With this unit, a muting circuit is provided that short-circuits the output by means of realy for about 10 seconds after the power is turned on or off, which completely removes this nuisance.

Necessary and Sufficient Noise Ratio

At the 30 dB position, the input-equivalent noise is -150 dB/V, input shorted, based upon IHF A-curve. Generally speaking, with a head amp whose 1st stage is composed of transistors, the S/N ratio is excellent when a low-impedance cartridge is used, but it is audibly deteriorated at the time of use of high-impedance cartridge. With this unit, FET's are employed at the 1st stage, and the S/N ratio is immune to fluctuation of impedance. At the 20 dB position the noise level is -148 dB/V.

Amplitude Selector

Most MC cartridges are classified into 2, one with an extremely mall output voltage and the other with a relatively large output voltage. To handle both types, the amplitude selector is abile to select either 20 dB or 30 dB gain. Also, the ''Bypass'' position is useful when an MM cartridge is used. needless to say, appropriate counter-measures are taken against shock noises at the time of switching.

Perfect Elimination of External Inductance Noise

The inside is shielded by quality silicon steel plate so as to minimize the noises caused by the inductance of transformer of amp or phono-motor of turntable, and also the input terminal is directly wired to the printed circuit board with the optimum earth point, which ensures virtually perfect elimination of external inductance noise.

High-Quality Power Supply Section

Ripple ingredients are suppressed by means of a ripple filter, and at the high sensitivity constant voltage power supply circuitry effective counter-measures are taken to prevent power source noises. In addiction, a decoupling circuit of large capacitance is used.

Other Features

Contact resistance increases as time goes by. To ensure ultra low contact resistance and to prevent its possible deterioration with the lapse of time, gold-plated pin-jack terminals are employed. naturally, specially selected components are used, and the best-quality metalic film resistors, precision potentiometers, and metalized film capacitors, are placed at optimum points.

Specifications

Voltage Gain:

20 dB (MC cartridges of middle output type)

30 dB (MC cartridges of low output type)

Frequency Response: 5 Hz - 500,000 Hz (-1 dB)

Total Harmonic Distortion:

no more than 0,003% (20 dB position, output 300 mV, 20 -20,000 Hz)

no more than 0,005% )30 dB position, output 300 mV, 20 - 20,000 Hz)

Input Equivalent NOise:

-150 dBV (30 dB position, iput short-circuited, RIAA, IHF-A weighted)

-148 dBV (20 dB position,input short-circuited, RIAA, IHF-A weighted)

Input Overloaded Voltage: no less than 90 dB (1 kHz); no less than 80 dB (20 kHz)

These headphones feature Yamaha's exclusive Orthodynamic Design, a concept radically different from conventional dynamic or electrostatic types. Instead of an ordinary voice coil and diaphragm, it uses an ultra thin, low mass, polyester film diaphragm, sandwiched by a pair of powerful disc magnets. The voice coils are photo-etched on the surface of the diaphragm. The performance that results is marked by smooth, even response over the entire audible frequency range, low distortion, and clear imaging. The YH-1000 is a delight to wear, also: the earcups use a supra-aural design which eliminates listening fatique, and height and tilt adjustment ensure comfort over long hours of use."YH-1000 ia an orthodynamic headphones which has emerged as a fruition of Yamaha's unique technology of acoustic equipment development. YH-1000 is provided with a capacity of distortion-free broad band reproduction from heavy low sound to ultra high band which is characteristic of a horizontal drive system. YH-1000 also incorporates a rare earth element magnet which generates strong flux and an aluminium diecast housing which eliminates unnecessary vibrations. These features contribute to the production of powerful yet clear sound. YH-1000 is the outcome of our quest to provide comfortable feeling of fitness to your ears and ease in use, which we hope you will find satisfactory".

Hear all there is to hear from your existing CD collection. Let the MDA1000 modify your music data stream from 16 bits to 24 bits, and to a sampling rate of 768kHz all while still in the digital domain. Then the MDA1000’s eight, 24 bit Burr Brown digital converter take things from there. This processing allows such gentile filtering to the converted signal that the original musicality comes through, instead of the sound of the digital circuits themselves. The difference is easily heard. Listen and you will be amazed at how older discs rival, or often exceed, the sound of the new “higher resolution format” discs.

The MDA1000 D/A Converter and its matching MCD1000 CD Transport represent the introduction of a new and elite product category from McIntosh. The philosophy behind this enhanced level of McIntosh products is nothing but the best…to deliver the absolute highest possible performance without design constraints. Available only through McIntosh Authorized Premier Dealers, the MDA1000 and the MCD1000 are merely the beginning of this exclusive line.

Seven Digital Inputs

3 Coaxial Inputs on RCA Jacks

3 Optical Inputs

1 Balanced Digital in on XLR Jack

Balanced (XLR) Outputs

Unbalanced (RCA) Analog Outputs

Front Panel Volume Control with

Optional Bypass Function

3D Glass Front Panel

Fiber Optic Lighting

Remote Control

POWER SUPPLY

Multiple layers of regulation provide clean power to all critical circuits. The power transformer has the lowest noise field of any available.

CIRCUIT SHIELDS

Each D to A Converter is shielded to avoid any chance of hum or noise getting through.

VOLUME CONTROL

Precision front panel and remote volume control allow the MDA1000 to function as a preamplifier in an all-digital system. Setup programming allows volume control bypass if desired.

Touch the open/close button to send the machined aluminum disc tray gliding out to receive your CD. The MCD1000 takes it from there. Extraction of all of the data on the disc without errors is what this transport is about. The machined aluminum top and side panels, combined with fiber optically lit 3D glass front panel not only add lasting beauty, but also provide a massive enclosure for the disc drive transport. Combined with a new floating table for the optics, the MCD1000 laser pick-up is incredibly well isolated from the outside world. Vibration never reaches the optical system, reducing errors. Reduced errors results in full retrieval of every detail of your music.

The MCD1000 CD Transport and its matching MDA1000 D/A Converter represent the introduction of a new and elite product category from McIntosh. The philosophy behind this enhanced level of McIntosh products is nothing but the best…to deliver the absolute highest possible performance without design constraints. Available only through McIntosh Authorized Premier dealers, the MCD1000 and the MDA1000 are merely the beginning of this exclusive line.

Three Types of Digital Outputs:

Coaxial Output on RCA Jack

Optical Output Jack

Balanced Digital AES/EBU

110 ohm XLR Output

2-Way Repeat Function

16-Selection Random Programming

Data In/Out Jacks

3D Front Panel Design

Fiber Optic Lighting

Remote Control

POWER SUPPLY

Multiple layers of regulation provide clean power to all critical circuits. The R-Core power transformer has the lowest noise field of any available.

TRANSPORT ISOLATION

High power systems with high power woofer systems place greater demands on the CD transport. The MCD1000 is designed to work under these conditions without producing tracking error that must be corrected later down the data stream.

MACHINED TOP AND SIDE PANELS

The top and sides of the MCD1000 are machined from thick aluminum panels with a smooth black anodized finish. In the recessed area of the top panel is a glass panel screened with a block diagram of the MCD1000’s circuitry.

JVC's new line of stereo receivers offer outstanding models to suit your budget, power output requirements and musical tastes. Rach one incorporates the finest JVC technology for reliable performance over long years of use. Four of the receivers use a supersmooth DC power amplifier and the hi-fi accuracy and flexibility offered by JVC's S.E.A. Graphic Equalizer and S.E.A. Recording, superb FM/AM tuner technology and more. DC Amp design improves musical quality for more accurate reproduction of all musical sources, a virtue you'll hear immediately. DC also reduces all types of distortion, expands frequency response from zero HZ to 100 kHz - and, overall, leads to the elimination of coloration and poor transient response. The DC power amp in every JVC receiver features an exceptionally low 0,03% total harmonic distortion, more reasons why with JVC you'll move Closer to theMusical Truth.

SEA all the way

All four receivers offer JVC's five-zone graphic equalizer for more complete control of the music spectrum than conventional tone controls. You can attenuate or accentuate any of five separate musical bands and as an added feature we've incorporated a special button so that the S.E.A. circuit can be switched to your tape deck.

Pushbutton Source Selectors

A horizontal panel of pushbuttons provides total control over all functions. And brilliantly illuminated LED's instantly indicate the program source. Professional type slider controls set volume and balance. Combine all these exclusive features with high sensitivity and tuning precision, thumb control tuning wheel and accurate dual-metering and you'll see just how revolutionary the new JVC DC integrated stereo receivers are.

JVC's new line of stereo receivers offer outstanding models to suit your budget, power output requirements and musical tastes. Rach one incorporates the finest JVC technology for reliable performance over long years of use. Four of the receivers use a supersmooth DC power amplifier and the hi-fi accuracy and flexibility offered by JVC's S.E.A. Graphic Equalizer and S.E.A. Recording, superb FM/AM tuner technology and more. DC Amp design improves musical quality for more accurate reproduction of all musical sources, a virtue you'll hear immediately. DC also reduces all types of distortion, expands frequency response from zero HZ to 100 kHz - and, overall, leads to the elimination of coloration and poor transient response. The DC power amp in every JVC receiver features an exceptionally low 0,03% total harmonic distortion, more reasons why with JVC you'll move Closer to theMusical Truth.

SEA all the way

All four receivers offer JVC's five-zone graphic equalizer for more complete control of the music spectrum than conventional tone controls. You can attenuate or accentuate any of five separate musical bands and as an added feature we've incorporated a special button so that the S.E.A. circuit can be switched to your tape deck.

Pushbutton Source Selectors

A horizontal panel of pushbuttons provides total control over all functions. And brilliantly illuminated LED's instantly indicate the program source. Professional type slider controls set volume and balance. Combine all these exclusive features with high sensitivity and tuning precision, thumb control tuning wheel and accurate dual-metering and you'll see just how revolutionary the new JVC DC integrated stereo receivers are.

Onkyo's TX-1500 proves that superb performance is a function of design and construction. This receiver has been designed for sophistication providing a variety of convenience usually found only in highest priced units. Start with Servolock, Onkyo's unique tuning system, which automatically tuners in the best reception with minimum distortion and maximum separation when the dial is set near the desired station. Once the signal is locked in, it maintains the best reception without any drift, even though changes in temperature and frequency occured

The tuner using an ingeniously designed FET/3-gang variable capacitor front end. Onkyo's TX-1500 provides 2,3 μV of usable sensitivity in mono and 5 μV in stereo mode, with in IF rejection ratio of 80 dB for extraordinary sensitivity without distortion.

2-stage, 4 element ceramic filters and quadrature detector deliver maximum frequency response with minimal distortion in the IF stage. Clean, sharp stereo reception is assured through the use of Phase Locked Loop Mutiples circuitry which synchronizes the stereo pilot signal in both phases. Phase shift is avoided and stereo separation is stable at 35 dB (1 kHz) and 30 dB (100-10,000 Hz)

Power output is 75 watts per channel, minimum RMS at 4 ohms or 8 ohms, both channel driver from 20 Hz to 20 kHz with no more than 0,5% THD.

Servolock ofcourse, is the most important feature. Smooth, FM muting effectively eliminates harsh, interruptive noise as you change station.No other receiver in this price class has our transient noise killer circuit to eliminate pops and crackles when the power is tunned on. And youhave a dual tape monitor system and one-way dubbing. Plus provision for two speaker systems. And thermal protection in the power transformer.

Thorens knows how to bulid high quality turntables meeting the specific needs of every user, and in fact since the existance of records.

Flability and long term maintenance of the original characteristics rank first in the company's rules.

The new TD-535 professional transcroption turntable has been developed by Thorens exactly in this way, for broadcasting studios and discotheques.

Shortest run-up time

A direct drive motor of European make, improved according to Thorens specifications and controlled by a costly electronic circuit, accelerates the zino-aluminium turntable platter to reach the 33⅓ rpm speed in less than 0,5 second. This exceptional value is exceeded only by the more expensive TD524 model, also manufactured by Thorens. The motor has a high torque so that slip-mats or record cleaning devices with dragging action can be used without problem. The nominal speed is quarz controlled.

Anti-feedback suspension

The low frequency sound waves loved by Disco fans, generally cause serious feedback problems in discotheques. Not so with TD-535. A new, genial floating chassis suspension is combined with the fast starting direct drive system in such a way that the suspended chassis remains free of rotational vibrations during the acceleration process. The Thorens floating chassis suspension isolates the platter - tones arm assembly from external footfall and low frequency sound waves. This association of a direct drive system with a floating chassis suspension is unique and helps solving all location problems in discotheques and broadcasting studios.

Vario Control

An easily accessible sliding pitch control permits a ±15% variation of the nominal speed. An important feature for discotheques and dancing schools.

Heavy duty, high quality TP 90 tone arm

For optimum in tracking ability it is not sufficient that a tone arm has a low bearing friction. It is much more important that it has a low effective mass, because high mass prevents the stylus from following the imperfections (warp or ripple) of the record as it should do. Precision bearings are used in this professional arm, making it insensitive to shock and rough handling. A high precision screw-coupling offers the facility of a plug-in shell without adding any imperfections to the resonance characteristics of the tone arm.

The TP90 has been designed in such a way that none of its elements produce any perturbing self-resonances. Such resonances alter the sound quality and modify the timbre of the instruments. In addition to the optimization of all components, the tone arm as a whole has been harmonized for a great robustness and a total sound neutrality. it will match ideally with almost every cartridge.

Quality and durability

High quality and long term stability characterize all Thorens products. Since over 105 years, Thorens has been manufacturing high value, reliable instruments for the reproduction of music. The technical data published are quaranteed values and they are maintained even after years of intensive use.

Should replacement parts become necessary, Thorens holds stocks of spare parts for a minimum of 10 years and in most casses for 20 years and over.

The AR-11 is the most accurate speaker system ever made by Acoustic Research. Its performance, drivers, and crossover are identical to those of the AR-10π, except that the Ar-11 does not incorporate a Woofer Environmental Control and the associated crossover components. The AR-11 is designed for optimum performance when placed against a wall, as on a bookshelf, or slightly away from two room surfaces, as illustrated.

The AR-11 uses a substantially improved version of the 305 mm (12 in) woofer with which Acoustic research introduced the acoustic suspension principle to home listeners, as well as the hemispherical dome midrange of the AR-3a. It also uses a newly designed 19 mm (3/4 in) highrange based on the original high-frequency dome radiator introduced by Acoustic Research in 1959. This highrange driver incorporates new diaphragm materials, voice coil, and construction techniques that have produced significant improvements in performance over earlier versions. it has a lower resonance frequency and more extended high-frequency response, plus greater efficiency and higher available output.

These drivers are used with a new crossover network to produce a speaker system with uniformly dispersed flat energy output to the highest audible frequencies. It is able to transmit the information from a program source to listeners in most locations in a room with an unprecedented degree of accuracy.

A pair of three-position switches provide a means of decreasing the overall level of the midrange and highrange drivers in 3 dB steps. The "0" position of the switches should provide the most listening rooms, while the "-3 dB" and "-6 dB" settings are useful for compensating for the effects of more reverberant, or "live" rooms.

The AR-11 shares many of the appearance features of the AR-10π, including an easily removable precision-machined foam grill, which was chosen for its near-perfect acoustical transparency.

Specifications

Drive units:

Woofer: acoustic suspension 305 mm (12 in)

Midrange; hemispherical dome 38 mm (1½ in)

Highrange: hemispherical dome 19 mm (¾ in)

Crossover frequencies: 525 Hz, 5000 Hz

Impedance: 4 Ω nominal

Efficiency: 86 dB 1W/1m

Controls: two 3-position switches for midrange and highrange level control

Minimum 25 watts per channel for an averge room, to obtain a closer approx. of the minimum power required, in continous RMS watts per channel for the realistic reproduction of musical sound levels in a perticular room, divide the volume of the listening room, measured in cube feet by 100; 25 watts (into one speaker only) will produce 100 dB SPL in a 3000 cu ft room of average reflectivity (energy absorption coefficient of 0,15); 50 watts (25 watts per channel) will produce 103 dB SPL in the same room

Power-handling ability:

Maybe used with amplifiers capable of delivering up to 150 watts continuous power per channel being driven to clipping 10% of the time, on normal music source material